com.google.common.util.concurrent
Class ForwardingBlockingQueue<E>

java.lang.Object
  extended by com.google.common.collect.ForwardingObject
      extended by com.google.common.collect.ForwardingCollection<E>
          extended by com.google.common.collect.ForwardingQueue<E>
              extended by com.google.common.util.concurrent.ForwardingBlockingQueue<E>
Type Parameters:
E - the type of elements held in this collection
All Implemented Interfaces:
Iterable<E>, Collection<E>, BlockingQueue<E>, Queue<E>

public abstract class ForwardingBlockingQueue<E>
extends ForwardingQueue<E>
implements BlockingQueue<E>

A BlockingQueue which forwards all its method calls to another BlockingQueue. Subclasses should override one or more methods to modify the behavior of the backing collection as desired per the decorator pattern.

Since:
4.0
Author:
Raimundo Mirisola

Constructor Summary
protected ForwardingBlockingQueue()
          Constructor for use by subclasses.
 
Method Summary
protected abstract  BlockingQueue<E> delegate()
          Returns the backing delegate instance that methods are forwarded to.
 int drainTo(Collection<? super E> c)
           
 int drainTo(Collection<? super E> c, int maxElements)
           
 boolean offer(E e, long timeout, TimeUnit unit)
           
 E poll(long timeout, TimeUnit unit)
           
 void put(E e)
           
 int remainingCapacity()
           
 E take()
           
 
Methods inherited from class com.google.common.collect.ForwardingQueue
element, offer, peek, poll, remove, standardOffer, standardPeek, standardPoll
 
Methods inherited from class com.google.common.collect.ForwardingCollection
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, standardAddAll, standardClear, standardContains, standardContainsAll, standardIsEmpty, standardRemove, standardRemoveAll, standardRetainAll, standardToArray, standardToArray, standardToString, toArray, toArray
 
Methods inherited from class com.google.common.collect.ForwardingObject
toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.concurrent.BlockingQueue
add, contains, offer, remove
 
Methods inherited from interface java.util.Queue
element, peek, poll, remove
 
Methods inherited from interface java.util.Collection
addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, size, toArray, toArray
 

Constructor Detail

ForwardingBlockingQueue

protected ForwardingBlockingQueue()
Constructor for use by subclasses.

Method Detail

delegate

protected abstract BlockingQueue<E> delegate()
Description copied from class: ForwardingObject
Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.

Specified by:
delegate in class ForwardingQueue<E>

drainTo

public int drainTo(Collection<? super E> c,
                   int maxElements)
Specified by:
drainTo in interface BlockingQueue<E>

drainTo

public int drainTo(Collection<? super E> c)
Specified by:
drainTo in interface BlockingQueue<E>

offer

public boolean offer(E e,
                     long timeout,
                     TimeUnit unit)
              throws InterruptedException
Specified by:
offer in interface BlockingQueue<E>
Throws:
InterruptedException

poll

public E poll(long timeout,
              TimeUnit unit)
       throws InterruptedException
Specified by:
poll in interface BlockingQueue<E>
Throws:
InterruptedException

put

public void put(E e)
         throws InterruptedException
Specified by:
put in interface BlockingQueue<E>
Throws:
InterruptedException

remainingCapacity

public int remainingCapacity()
Specified by:
remainingCapacity in interface BlockingQueue<E>

take

public E take()
       throws InterruptedException
Specified by:
take in interface BlockingQueue<E>
Throws:
InterruptedException


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